Wrench.



No. 636,247. Patented Nov. 7, I899.

C.ENGSTBAND;

WRENCH.

(Apjrlicatio'n filed July 22, 1399.

(No Model) mm ff wi haeowa UNITED STATES PATENT OFFICE.

CHARLES EN GSTRAND, OF HARTFORD, CONNECTICUT.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 636,247, dated November 1899. Application filed July 22,1899. Serial No. 724,814:- (No model.)

To aZZ whom it may concern.-

Be it known that I, CHARLES ENGSTRAND, a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented a new and useful Wrench, of which the following is a specification.

My invention relates to the general class of wrenches, but more particularly to slidingjaw wrenches in which a mutilated threaded screw is used to form a lock for the movable jaw, and has for its object to provide an improved means for assembling the parts and to cheapen the cost of manufacture and improve the wrench generally.

In order that others skilled in the art to which my invention appertains may make and use the same, I will now proceed to describe its construction, reference being had to the accompanying drawings, in which Figure l is a perspective View of my improved wrench ready for use. Fig. 2 is a side elevation of the same. Fig. 3 is a cross-section on the line 3 3, Fig. 2; and Fig. 4 is a fragmentary detail view showing the slot for inserting the locking-screw.

Referring now to the drawings by reference-numerals, 5 indicates the stationary jaw, from which extends a shank 6, having a series of female threads cut on its inner edge and on which is slidably secured a movable jaw 7, carrying a rotatable male-threaded locking-screw 8, mutilated or cut out at one side to permit the slidable jaw.7 to freely slide upon the shank 6 and designed to have its threads engage with the female threads thereof. The manner of securing this threaded screw 8 in the movable jaw is as follows: Before the movable jaw is slid upon the shank 6 the ends 9 and 10 of the screw are forced into the slots 11 and 12, which are cut or cast from the side to about the center, but at a tangent to the longitudinal center of the said jaw. It will thus be seen that when the said screw is thus placed in the jaw and the jaw placed in engagement with the shank it will be impossible for the screw to be removed without removing the slidable jaw.

The handle 13 comprises a recessed block which is secured to the end of the shank by means of a screw 14, and this handle will pre vent any disarrangement of the various parts. It will thus be seen that should it be found necessary to replace the locking-screw for any cause all that is necessary is to remove the handle 13, slide the jaw 7 ofi the shank, and replace the locking-screw with a new one.

From the foregoing it will readily be seen that I have provided an improved construction of wrench of the kind described the parts of which can easily be assembled and taken apart and one that should commend itself to the trade generally.

Having thus fully described my invention, what I claim as new, and desire to obtain by Letters Patent, is-

1. In a wrench of the character described, a movable jaw having a slot near the upper edge thereof and a slot near the lower edge designed to hold a threaded screw, said slots extending from the side to near the center, substantially as described.

2. In a sliding-jaw wrench, the combination with a rigid jaw, and a shank depending therefrom, of aslidable jaw secured on said shank and having slots in its sides tangential to the longitudinal center thereof designed to receive the bearing ends of a locking-screw, substantially as described.

3. In a sliding-jaw wrench, the combination with a rigid jaw, and a shank extending therefrom, of a movable jaw having tangentially-arranged bearing-slots in its side face designed to receive the ends of a lockingscrew, whereby the screw will be locked in said jaw when in engagement with the shank and adapted to be withdrawn when the jaw is detached, substantially as described.

CHARLES ENGSTRAND.

Witnesses:

A. P. PETERSON, EINIs HJERPE. 

